Table 6: Antibacterial activity of unirradiated and irradiated Streptomyces janthinus M7 against clinical bacterial isolates.


Inhibition zone mm of 0.2 ml broth of unirradiated and irradiated Streptomyces janthinus M7 at dose levels (0.0, 0.5, 1.5 kGy)

Clinical isolates Dose level
0.0 0.5 kGy 1.5 kGy
Klebsiella oxytoca m1 20 20 16
Enterobacter cancerogenus m2 18 20 20
P. aeruginosa m3 16 16 −ve
Citrobacter diversus m4 18 18 12
Enterobacter agglomerans m5 20 16 16
Klebsiella oxytoca m6 12 15 12
Enterobacter dissolvens m7 −ve −ve −ve
Serratia fonticola m8 14 12 −ve
Escherichia coli m9 18 16 12
Citrobacter freundii m10 18 18 12
Staphylococcus aureus m11 16 12 −ve
Escherichia coli m12 −ve 14 −ve
P. aeruginosa m13 11 14 11
Staphylococcus aureus m14 −ve −ve −ve
Bacillus cereus m15 −ve −ve −ve